JP2012239367A - Fire resistant cover, fire resistant wiring box, and installation structure of fire resistant wiring box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent flame, smoke, toxic gases, and the like from flowing into a rear side of a wall even though a wiring box made of a synthetic resin is adopted.SOLUTION: A fire resistant wiring box 1 is formed by a wiring box 10 made of a synthetic resin and a metal fire resistant cover 30 having a housing space 33 for housing the wiring box 10.

Description

  The present invention relates to a fireproof cover, a fireproof wiring box having a fireproof cover, and an installation structure of the fireproof wiring box.

  In order to install the wiring apparatus on the wall of the building, a wiring box formed in the shape of a bottomed square box having an opening on the front surface by a synthetic resin material is installed on the back side of the wall. The wiring box is integrally formed with a screw holding portion for holding a wiring device mounting screw and a magnet holding portion (tubular body) for holding a magnet for detecting the wiring box installed on the back of the wall. Yes. (For example, refer to Patent Document 1 and Patent Document 2).

JP 2004-153997 A JP 2010-119219 A

  By the way, since the wiring box of patent document 1 and patent document 2 consists of synthetic resin materials, it does not have fire resistance. For this reason, when a wiring box burns by fire, there exists a possibility that a flame, smoke, toxic gas, etc. may flow into the back of a wall. Therefore, it is conceivable to form the wiring box with a metal material in order to provide the fire resistance to the wiring box. However, the metal material makes it difficult to form the screw holding part and the magnet holding part. For this reason, it is desired that the wiring box be made of synthetic resin.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is that flames, smoke, toxic gases, etc. flow into the back of the wall while adopting a synthetic resin wiring box. It is an object of the present invention to provide a fireproof cover, a fireproof wiring box, and a fireproof wiring box installation structure that can prevent the above.

  In order to achieve the above object, the invention according to claim 1 is formed in a bottomed box shape having an opening on the front surface by a peripheral wall including a bottom wall and a side wall standing on the periphery of the bottom wall. In addition, the gist is that the housing space for housing the synthetic resin wiring box that is installed on the back of the wall and fixed to the construction material for constructing the wall includes a metal cover body formed by the peripheral wall.

  The invention according to claim 2 is the invention according to claim 1, wherein the cover body includes a flange extending outward from an opening edge of the peripheral wall, and the flange is the wall of the cover body. The gist is that the flange is in contact with the front surface of the construction material in the installed state on the back side, and the thickness of the flange has no influence when a wall material is installed on the front surface of the construction material.

The gist of the invention described in claim 3 is that, in the invention described in claim 2, the flanges are formed on at least opposing side walls.
The gist of the invention of claim 4 is that, in the invention of claim 3, the flange is formed on the entire circumference of the opening edge of the peripheral wall.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the cover body abuts against a side surface of the building material in an installed state on the back of the wall. The contact portion is formed with a through hole for a fixing member that fixes the wiring box to the construction material, and the wiring box is formed with an insertion hole through which the fixing member is inserted. In the state where the wiring box is accommodated in the accommodation space, the gist is that the through hole is provided at a position corresponding to the insertion hole.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a cable penetration hole into which a cable is penetrated is formed on the side wall of the cover body. The gist is that a space is formed in the housing space between the side wall in which the cable penetration hole is formed and the side wall of the wiring box facing the side wall.

  According to a seventh aspect of the present invention, in the invention of the sixth aspect, on the side wall of the cover main body, a cable drawn into the housing space from the cable insertion hole is disposed outside the side wall of the wiring box. The gist of the invention is that a space forming portion is provided which forms a cable wiring space for wiring toward a cable insertion hole formed on the side wall of the wiring box while being lined.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein when the wiring box is housed in the housing space, the wiring box is placed on the peripheral wall. The gist is that a positioning portion for positioning in the accommodation space is provided.

  The invention according to claim 9 is a fireproof wiring box installed on the back of the wall, the wiring box made of synthetic resin fixed to the construction material for constructing the wall, the bottom wall, and the periphery of the bottom wall A metal cover which is formed in a bottomed box shape having an opening on the front surface by a peripheral wall composed of a side wall standing upright, and is installed on the back of the wall, and a housing space for housing the wiring box is formed by the peripheral wall It consists of a fireproof cover provided with a main body.

  The invention according to claim 10 is an installation structure of a fireproof wiring box installed on the back side of a wall in which a wall material is installed on the front surface of a plurality of construction materials, and the fireproof wiring box includes the construction It is formed in the shape of a bottomed box having an opening on the front surface by a peripheral wall composed of a synthetic resin wiring box fixed to the material, a bottom wall, and a side wall standing on the periphery of the bottom wall, and on the back of the wall The housing includes a metal cover body in which a housing space for housing the wiring box is formed by the peripheral wall, and a flange extending outward from an opening edge of the peripheral wall is at least opposed to the cover body. It consists of a fireproof cover formed on the side wall, and the gist is that the flange is sandwiched between the front surface of the two construction materials sandwiching the cover body and the wall material.

  According to an eleventh aspect of the present invention, in the invention according to the tenth aspect, the cable is routed toward a cable insertion hole formed in the side wall of the cover body while being along the outside of the side wall of the cover body. The cable wiring space is formed between the construction material and the side wall of the cover main body facing the construction material.

  The invention according to claim 12 is an installation structure of a fireproof wiring box installed on the back side of a wall in which a wall material is installed on the front surface of the construction material, and the fireproof wiring box is attached to the construction material. It is formed in the shape of a bottomed box having an opening in the front by a peripheral wall composed of a synthetic resin wiring box to be fixed, a bottom wall, and a side wall standing on the periphery of the bottom wall, and is installed behind the wall. The housing space for housing the wiring box comprises a fireproof cover including a metal cover main body formed by the peripheral wall, and a cable penetration hole is formed in a lower side wall of the side walls, The gist is that the cable is drawn into the housing space from the insertion hole.

  According to a thirteenth aspect of the present invention, in the twelfth aspect of the present invention, a cable wiring space for wiring the cable toward the cable insertion hole is formed along the side wall of the cover body. This is the gist.

  According to the present invention, it is possible to prevent a flame, smoke, toxic gas or the like from flowing into the back of the wall while adopting a wiring box made of synthetic resin.

The perspective view which shows the wiring box and fireproof cover in embodiment. The top view which shows the state in which the wiring box was accommodated in the fireproof cover. Sectional drawing which shows the state which inserted the driver in space. Sectional drawing which shows the state which has removed the knock part with the driver. Sectional drawing which shows the state which has arrange | positioned the bushing in the cable penetration hole. The perspective view which shows the state which fixed the fireproof wiring box to the pillar. Sectional drawing which shows the state which installed the fireproof wiring box in the wall back. Sectional drawing which shows the state which installed the fireproof wiring box in another embodiment in the wall back. The front view which shows the state which fixed the fireproof wiring box in another embodiment to the pillar. Sectional drawing which shows the state which installed the fireproof wiring box in the wall back. The front view which shows the state which fixed the fireproof wiring box in another embodiment to the pillar. Sectional drawing which shows the state which installed the fireproof wiring box in the wall back. Sectional drawing which shows the state which installed the fireproof wiring box in another embodiment in the wall back.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the fireproof wiring box 1 includes a wiring box 10 installed on the back of a wall and a fireproof cover 30 covering the wiring box 10.

First, the wall W where the fireproof wiring box 1 is installed will be described.
As shown in FIG. 7, the wall W includes a pillar H as a construction material, and a pair of gypsum board wall materials W <b> 1 standing on both front and rear sides of the pillar H (in FIG. 7, only one wall material W <b> 1 is illustrated. ) And. In addition, a hollow portion W2 is formed between the pair of wall materials W1, and a heat insulating member (not shown) such as a foamed polystyrene plate, glass wool, or a hard foamed urethane plate is provided in the hollow portion W2.

Next, the wiring box 10 will be described.
As shown in FIG. 1, the wiring box 10 is made of synthetic resin, and has a rectangular plate-shaped bottom wall 11 and four side walls 12 a to 12 d erected from the periphery of the bottom wall 11. It is formed in a square box shape with a bottom having an opening 13 in the bottom. The peripheral wall of the wiring box 10 is formed by the bottom wall 11 and the side walls 12a to 12d. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 12a and a lower side wall 12b, and the left and right side walls in FIG. 1 are referred to as a right side wall 12c and a left side wall 12d.

  Two cable insertion holes 14 are formed in the upper side wall 12a and the lower side wall 12b. Boss portions 15 projecting inward are provided on the inner surfaces of the upper side wall 12a and the lower side wall 12b. Each boss portion 15 is used for attaching a wiring device (not shown) to the wiring box 10. A magnet holding portion 20 is erected at the center portion of the bottom wall 11 in the long side direction (vertical direction) and the short side direction (left and right direction), and a magnet is provided at the front end portion (tip portion) of the magnet holding portion 20. 17 is held.

  In the bottom wall 11, a plurality (three in this embodiment) of screw holding portions 18 projecting toward the opening 13 are provided on the upper side wall 12 a side and the right side wall 12 c side at a predetermined interval. ing. The shaft 19a of the wiring fixture mounting screw 19 made of a metal material is forcibly inserted between the adjacent screw holding portions 18 so that the wiring fixture mounting screws 19 are interposed between the screw holding portions 18. It is supposed to be held at. A plurality (three in the embodiment) of insertion holes 16 through which fixing screws B (see FIG. 6) as fixing members are inserted are formed in the left side wall 12d. The fixing screw B is used for fixing the wiring box 10 to the pillar H.

  A fitting recess 21 that is recessed toward the opening 13 is formed on the outer surface of the bottom wall 11. The fitting recess 21 is formed in the central portion of the outer surface of the bottom wall 11 so as to extend between the right side wall 12c and the left side wall 12d along the left-right direction.

Next, the fireproof cover 30 will be described.
The fireproof cover 30 includes a cover body 31 made of a metal material formed in a bottomed square box shape having an opening 31a on the front surface (one surface). Specifically, the cover main body 31 is formed of a rectangular plate-like bottom wall 32 and four side walls 32 a to 32 d erected from the periphery of the bottom wall 32. A peripheral wall of the cover body 31 is formed by the bottom wall 32 and the side walls 32a to 32d. Further, the cover main body 31 has an accommodation space 33 which is enclosed by the bottom wall 32 and the side walls 32a to 32d and can accommodate the wiring box 10. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 32a and a lower side wall 32b, and the left and right side walls in FIG. 1 are referred to as a right side wall 32c and a left side wall 32d.

  As shown in FIG. 2, the right side wall 32c and the left side wall 32d are each provided with two positioning pieces 36, 37 protruding from the inner surfaces thereof into the cover main body 31. The positioning pieces 36 and 37 are provided at positions facing each other on the inner surfaces of the right side wall 32c and the left side wall 32d, and are linearly formed along the direction perpendicular to the bottom wall 32 between the opening 31a and the bottom wall 32. It extends. The front end surfaces 36a and 37a (surfaces of the positioning pieces 36 and 37 facing each other) on the protruding direction side of the positioning pieces 36 and 37 are flat surfaces.

  As shown in FIG. 1, a positioning protrusion 40 that protrudes toward the opening 31 a is formed on the inner surface of the bottom wall 32. The positioning protrusion 40 is formed at the center of the inner surface of the bottom wall 32 so as to extend along the left-right direction between the right side wall 32c and the left side wall 32d. The positioning protrusion 40 can be fitted into the fitting recess 21.

  A square ring-shaped flange 41 is integrally formed on the entire periphery of the peripheral edge of the opening 31 a in the cover body 31. The flange 41 is formed to extend from the entire periphery of the peripheral edge of the opening 31 a toward the outside of the cover body 31. As shown in FIG. 7, the thickness M1 of the flange 41 is a thickness (for example, about 0.5 mm to 1.0 mm) that does not affect when the wall material W1 is installed on the front surface of the column H. Here, the “thickness that does not affect when the wall material W1 is installed on the front surface of the column H” means that the thickness of the flange 41 is such that the rear surface of the flange 41 is in contact with the front surface of the column H. Even if the wall material W1 is installed on the front surface, the thickness is such that a large gap is not formed between the front surface of the column H and the rear surface of the wall material W1.

  The left side wall 32d is a contact portion that can contact the side surface of the column H when the fireproof cover 30 is installed on the column H. Further, a plurality of through holes 38 (three in the present embodiment) through which the fixing screws B are inserted are formed in the left side wall 32d.

  As shown in FIG. 1, two cable penetration holes 34 can be formed in the upper side wall 32a and the lower side wall 32b. The cable insertion hole 34 is opened for the first time when the cable C (see FIG. 6) is inserted, and is closed by a knock portion 34a when the cable C is not inserted. The cable insertion hole 34 is opened with a dimension that allows a clearance to be formed between the cable C and the cable insertion hole 34 so that the cable insertion hole 34 does not easily interfere with the cable C.

  As shown in FIG. 2, the distance L1 between the outer surface 121a of the upper wall 12a of the wiring box 10 and the outer surface 121b of the lower wall 12b is from the inner surface 321a of the upper wall 32a of the cover body 31 to the inner surface 321b of the lower wall 32b. The distance is shorter than the distance L2. Further, the distance L3 from the outer surface 121c of the right side wall 12c of the wiring box 10 to the outer surface 121d of the left side wall 12d is substantially the same as the distance L4 between the front end surfaces 36a and 37a of the positioning pieces 36 and 37. Yes.

  Then, the wiring box 10 is inserted so as to be forced into the accommodation space 33. Then, the wiring box 10 is sandwiched between the front end surfaces 36a and 37a of the positioning pieces 36 and 37, and the movement of the wiring box 10 in the left-right direction in the accommodation space 33 is restricted. Furthermore, when the positioning protrusion 40 and the fitting recess 21 are fitted, movement in the vertical direction in the accommodation space 33 in the wiring box 10 is restricted. As a result, the wiring box 10 is positioned in the accommodation space 33. Therefore, in this embodiment, the positioning pieces 36 and 37 and the positioning protrusion 40 function as a positioning unit.

  In a state where the wiring box 10 is positioned in the accommodation space 33, the through holes 38 and the insertion holes 16 face each other, and the upper wall 12 a of the wiring box 10 and the cover main body 31 are located in the accommodation space 33. A space K1 is formed between the upper side wall 32a and a space K2 is formed between the lower side wall 12b of the wiring box 10 and the lower side wall 32b of the cover body 31.

  The depth of the accommodation space 33 is such that the opening 13 of the wiring box 10 is the same as the opening 31 a of the cover body 31 when the wiring box 10 is accommodated in the accommodation space 33 and the wiring box 10 is positioned in the accommodation space 33. It is set to lie on a plane. Therefore, the accommodation space 33 is formed in a size that allows the wiring box 10 to be accommodated in the accommodation space 33 from the opening 31 a and covers the entire outer surface of the wiring box 10 accommodated in the accommodation space 33. In this way, the wiring box 10 is accommodated in the fireproof cover 30, whereby the fireproof wiring box 1 including the fireproof cover 30 and the wiring box 10 is configured.

Next, the installation method with respect to the wall W of the fireproof wiring box 1 is demonstrated.
First, as shown in FIG. 3, the driver D is inserted into the space K1, and as shown in FIG. 4, the base end side of the driver D is rotated toward the lower side wall 32b, so that the tip end portion of the driver D is moved. The knock portion 34a is removed by pressing against the knock portion 34a. Thereby, one cable penetration hole 34 is opened in the upper side wall 32a. That is, the space K1 is a space necessary for removing the knock portion 34a.

  Subsequently, as shown in FIG. 5, a bushing 39 is disposed in the cable penetration hole 34. By this bushing 39, interference between the cable C and the cable insertion hole 34 is avoided. The bushing 39 is fixed to the cable penetration hole 34 by the elastic claw 39a of the bushing 39 protruding into the space K1 engaging with the peripheral edge of the cable penetration hole 34. That is, the space K <b> 1 is a space necessary for fixing the bushing 39 to the cable insertion hole 34.

  Subsequently, as shown in FIG. 6, the outer surface 321 d of the left side wall 32 d of the cover main body 31 is brought into contact with the side surface of the column H, and the fireproof wiring box is arranged so that the left rear surface of the flange 41 comes into contact with the front surface of the column H. 1 is placed. Subsequently, the fixing screw B is inserted into the insertion hole 16 of the wiring box 10 and the insertion hole 38 of the cover body 31, and the fixing screw B is forcibly screwed into the column H. Then, the fireproof wiring box 1 is fixed to the pillar H. Subsequently, the cable C is inserted into the cover main body 31 through the bushing 39, and the cable C inserted into the cover main body 31 is further drawn into the wiring box 10 through the cable insertion hole 14.

  Subsequently, as shown in FIG. 7, a wall material W <b> 1 is erected on the front side of the column H. Then, the refractory wiring box 1 is installed on the back side of the wall W with the left side of the flange 41 sandwiched between the rear surface of the wall material W1 and the front surface of the column H. Thus, the installation structure of the fireproof wiring box 1 is formed. At this time, the entire front surface of the flange 41 is in surface contact with the rear surface of the wall material W1. Then, the position of the magnet 17 is detected from the surface of the wall W using a magnet detector (not shown), the position of the wiring box 10 is detected, and a through hole Wa is formed in the wall material W1 using an electric drilling tool (not shown). To do. Then, the opening 13 of the wiring box 10 is exposed to the surface of the wall W through the through hole Wa.

  Subsequently, the magnet holding portion 20 is cut and removed from the base end side, and the wiring device mounting screws 19 held between the screw holding portions 18 are taken out through the through holes Wa, and these wiring device mounting screws are removed. 19 is used to attach a wiring device holding frame (both not shown) holding the wiring device to the wiring box 10. A decorative plate (not shown) is attached to the opening 13 side of the wiring box 10.

Next, the operation of the fireproof wiring box 1 of the present embodiment will be described.
When a fire or the like occurs, the synthetic resin wiring box 10 does not have fire resistance, and thus is easily burned by a fire. However, since the metal fireproof cover 30 has fire resistance, it is difficult to burn, and even if the wiring box 10 burns due to a fire, the fireproof cover 30 can cause flames, smoke, toxic gas, etc. on the back of the wall W. Inflow is prevented. Specifically, since the entire front surface of the flange 41 is in surface contact with the rear surface of the wall material W1, it is difficult for flame, smoke, toxic gas, and the like flowing into the fireproof cover 30 to flow into the back of the wall W.

In the above embodiment, the following effects can be obtained.
(1) The fireproof wiring box 1 is formed of a synthetic resin wiring box 10 and a metal fireproof cover 30 having a housing space 33 for housing the wiring box 10. For example, if the wiring box itself is made of metal, the wiring box itself can have fire resistance, but if the wiring box itself is made of a metal material, the magnet holding portion provided in the wiring box 10 of the present embodiment. In the case of forming the screw 20 and the screw holding portion 18, it takes time and effort to process the metal, and the cost increases. However, according to the present embodiment, the wiring box 10 is formed of a synthetic resin material, and the fireproof cover 30 that accommodates the wiring box 10 is formed of metal. For this reason, while adopting the wiring box 10 made of synthetic resin, it is possible to ensure fire resistance by the fireproof cover 30 and to prevent inflow of flame, smoke, toxic gas, etc. into the back of the wall W. Can do.

  (2) If the flange 41 is too thick, a large gap is formed between the front surface of the column H and the rear surface of the wall material W1, which is not preferable. However, in the present embodiment, the thickness of the flange 41 is a thickness that does not affect when the wall material W1 is installed on the front surface of the column H. Therefore, the clearance gap formed between the front surface of the pillar H and the rear surface of wall material W1 can be suppressed.

  (3) The flange 41 is formed all around the peripheral edge of the opening 31a. Therefore, the entire front surface of the flange 41 can be brought into surface contact with the rear surface of the wall material W1, and flame, smoke, toxic gas, etc. in the fireproof cover 30 can be made difficult to flow into the back of the wall W.

  (4) Each penetration hole 38 is provided at a position corresponding to each insertion hole 16 in a state where the wiring box 10 is accommodated in the accommodation space 33. Therefore, when fixing the fireproof wiring box 1 to the column H, the fixing screw B that has passed through the insertion hole 16 of the wiring box 10 can be forcibly screwed into the column H through the through hole 38. . That is, the through hole 38 is not provided at a position corresponding to the insertion hole 16, and the fixing screw B that has passed through the insertion hole 16 can be prevented from being blocked by the cover body 31.

  (5) In the accommodation space 33, a space K1 is formed between the upper wall 12a of the wiring box 10 and the upper wall 32a of the cover body 31. And the cable penetration hole 34 can be formed in the upper side wall 32a by inserting the driver D in this space K1, and removing the knock part 34a by the front-end | tip part of the driver D. FIG. Furthermore, the elastic claw 39a of the bushing 39 disposed in the cable penetration hole 34 can be protruded into the space K1, and the elastic claw 39a can be locked to the peripheral edge of the cable penetration hole 34. As a result, the bushing 39 can be fixed to the cable insertion hole 34 and the fixing operation can be easily performed.

  (6) Positioning pieces 36 and 37 projecting into the cover body 31 are provided on the inner surfaces of the right side wall 32c and the left side wall 32d of the cover body 31, and positioning is performed on the inner surface of the bottom wall 32 so as to project toward the opening 31a. Protrusion 40 was provided. And the movement to the left-right direction in the accommodation space 33 in the wiring box 10 can be controlled by pinching the wiring box 10 by the front end surfaces 36a, 37a of the positioning pieces 36, 37. Furthermore, when the positioning protrusion 40 and the fitting recess 21 are fitted, the movement in the vertical direction in the accommodation space 33 in the wiring box 10 can be restricted. As a result, the wiring box 10 can be positioned at a position where the through holes 38 and the through holes 16 face each other and the spaces K1 and K2 are formed.

  (7) By arranging the refractory wiring box 1 so that the left rear surface of the flange 41 is in contact with the front surface of the column H, the opening 13 of the wiring box 10 can be brought close to the rear surface of the wall material W1. Therefore, the boss portion 15 can be as close as possible to the rear surface of the wall material W1. As a result, the wiring device holding frame can be easily attached to the wiring box 10, and workability is improved.

  (8) For example, if the wiring box itself is made of metal, it is necessary to ground the wiring box in order to ensure electrical insulation. However, since the wiring box 10 made of a synthetic resin material has electrical insulation, it is not necessary to ground the wiring box 10 and the configuration can be simplified.

In addition, you may change the said embodiment as follows.
As in the embodiment shown in FIG. 8, the outer surface 321d of the left side wall 32d of the cover body 31 is brought into contact with the side surface of one column H, and the outer surface 321c of the right side wall 32c is brought into contact with the side surface of the other column H. The fire-resistant wiring box 1 may be disposed so that the left rear surface and the right rear surface of the flange 41 are in contact with the front surfaces of both pillars H. When the wall material W1 is erected on the front surfaces of both pillars H, the fireproof wiring box 1 is mounted on the wall with the left and right sides of the flange 41 sandwiched between the rear surface of the wall material W1 and the front surfaces of both pillars H. The installation structure of the fireproof wiring box 1 is formed while being installed behind the W. According to this, it becomes difficult for the fireproof wiring box 1 to tilt with respect to the rear surface of the wall material W1, and the opening of the fireproof wiring box 1 can be easily maintained in a state parallel to the rear surface of the wall material W1. . Furthermore, the entire front surface of the flange 41 can be easily brought into surface contact with the rear surface of the wall material W1, and flames, smoke, toxic gas, etc. in the fireproof cover 30 can hardly flow into the back of the wall W. it can.

  In this embodiment, the flange 41 is not formed on the entire circumference of the peripheral edge of the opening 31a, but may be formed on the right side wall 32c and the left side wall 32d that are at least opposing side walls in the peripheral wall. That is, the portion of the flange 41 that is not sandwiched between the rear surface of the wall material W1 and the front surfaces of both pillars H may be deleted.

  In the embodiment shown in FIGS. 9 and 10, the right side wall 32c of the cover body 31 is formed to be bent into a stepped shape. Specifically, the right side wall 32 c is connected to the bottom wall 32 and is erected from the bottom wall 32, a second right side wall 52 that comes into contact with the side surface of the pillar H, and the first right side wall 51. And a stepped portion 53 that connects the second right side wall 52. The second right side wall 52 is located outward from the first right side wall 51. Two positioning pieces 36 project from the inner surface of the first right side wall 51.

  In a state where the wiring box 10 is housed in the housing space 33, a cable wiring space 55 extending in the vertical direction is formed between the outer surface of the right side wall 12 c of the wiring box 10 and the second right side wall 52 of the cover body 31. ing. Therefore, in this embodiment, the second right side wall 52 functions as a space forming portion that forms the cable wiring space 55. The upper end side of the cable wiring space 55 communicates with the space K1, and the lower end side communicates with the space K2.

  The outer surface 321d of the left side wall 32d of the cover body 31 abuts the side surface of one of the two columns H sandwiching the cover body 31, and the outer surface 521 of the second right side wall 52 is the other column H. The fireproof wiring box 1 is arranged so that the left rear surface and the right rear surface of the flange 41 are in contact with the front surfaces of both pillars H. As shown in FIG. 10, when the wall material W1 is erected on the front side and the rear surface side of both pillars H, the left and right sides of the flange 41 are sandwiched between the rear surface of the wall material W1 and the front surfaces of both pillars H. Has been. Note that the fireproof wiring box 1 is formed by forcibly screwing the fixing screw B inserted into the insertion hole 16 of the wiring box 10 and the insertion hole 38 of the cover body 31 into one of the pillars H. Fixed to H.

  In the installation structure of the fireproof wiring box 1, the cable C is drawn out to the space K <b> 1 through the cable insertion hole 34 formed in the upper side wall 32 a of the cover body 31 and formed on the upper side wall 12 a of the wiring box 10. The cable insertion hole 14 is extended toward the cable wiring space 55 so as to avoid the cable insertion hole 14. Further, the cable C passes through the cable wiring space 55 and extends to the space K2 along the outer surface of the right side wall 12c of the wiring box 10. The cable C is drawn into the wiring box 10 through the cable insertion hole 14 formed in the lower side wall 12 b of the wiring box 10.

  According to this, even when there is no space through which the cable C can pass between the fireproof wiring box 1 and the pair of wall materials W1, the use of the cable wiring space 55 makes it possible to The cable C wired from above can be drawn into the wiring box 10 through the cable insertion hole 14 formed in the lower side wall 12 b of the wiring box 10. In addition, in order to sandwich the left and right sides of the flange 41 between the front surface of both pillars H and the rear surface of the wall material W1, both pillars H and fireproofing are provided by bringing both pillars H as close as possible to the fireproof wiring box 1. There is a case where there is no space through which the cable C can pass between the conductive wiring box 1 and the cable. Even in this case, by using the cable wiring space 55, the cable C wired from above the cover body 31 can be routed through the cable insertion hole 14 formed in the lower side wall 12b of the wiring box 10. 10 can be withdrawn. In the embodiment shown in FIGS. 9 and 10, the cable insertion hole 14 may not be formed in the upper wall 12 a of the wiring box 10.

  In addition, when the fireproof wiring box 1 is installed behind the wall W, a cable wiring space 65 extending in the vertical direction is formed between the outer surface 511 of the first right side wall 51 and the side surface of the other column H. Yes. That is, the cable wiring space 65 is formed outside the cover body 31, not inside the cover body 31. Also in this case, as shown in FIGS. 11 and 12, the cable C is connected to the first right side wall 51 of the cover body 31 so as to avoid the cable insertion hole 34 formed in the upper side wall 32 a of the cover body 31. The cable wiring space 65 is allowed to pass along the outside. Further, the cable C having passed through the cable wiring space 65 is routed through the cable insertion hole 34 formed in the lower side wall 32b of the cover body 31 and the cable insertion hole 14 formed in the lower side wall 12b of the wiring box 10. You may make it pull in in 10.

  In the embodiment shown in FIGS. 11 and 12, the cable penetration hole 34 formed in the upper side wall 32a of the cover body 31 is closed by the knock portion 34a. In other words, the cover body 31 is formed with the cable insertion hole 34 only in the lower side wall 32b. Flames, smoke, toxic gases, etc. that have flowed into the fireproof cover 30 are likely to rise upward. However, in this embodiment, the cable penetration hole 34 is formed only in the lower side wall 32b of the cover main body 31 and the cable penetration hole 34 is not formed in the upper side wall 32a of the cover main body 31. It is possible to make it difficult for flames, smoke, toxic gases, etc. flowing into the wall W to flow into the back of the wall W.

  Further, the left and right sides of the flange 41 are sandwiched between the rear surface of the wall material W1 and the front surfaces of both columns H. However, the present invention is not limited to this, and for example, only the left side of the flange 41 is the rear surface of the wall material W1 and the columns H. It may be clamped between the front surface of the. That is, the right column H may be deleted. In this case, in the embodiment shown in FIGS. 11 and 12, the space outside the right side wall 32c of the cover body 31 behind the wall W functions as a cable wiring space.

  In addition, the cable C is wired from below the cover body 31 without being wired from above the cover body 31, and the cable insertion hole 34 formed in the lower wall 32 b of the cover body 31 and the lower wall of the wiring box 10. You may make it draw in in the wiring box 10 through the cable penetration hole 14 formed in 12b.

  As shown in FIG. 13, in the state where the fireproof wiring box 1 is installed behind the wall W and the installation structure of the fireproof wiring box 1 is formed, the outer surface of the right side wall 32c of the cover body 31 and the right side wall A cable wiring space 75 may be formed between the side face of the pillar H (the other pillar H) arranged on the 32c side. The cable wiring space 75 is formed by forming the length R1 on the right side of the flange 41 longer than the length R2 on the left side and sandwiching only the right end side of the flange 41 between the column H and the wall material W1. Has been.

  In the installation structure of the fireproof wiring box 1 shown in FIG. 7, the cable C is disposed outside the right side wall 32c of the cover body 31 so as to avoid the cable insertion hole 34 formed in the upper side wall 32a of the cover body 31. You may pass along along. The cable C is pulled into the wiring box 10 through the cable insertion hole 34 formed in the lower side wall 32b of the cover body 31 and the cable insertion hole 14 formed in the lower side wall 12b of the wiring box 10. Also good. In this case, the space outside the right side wall 32c of the cover body 31 behind the wall W functions as a cable wiring space.

  In the embodiment, the cable C is inserted into the cover main body 31 using the cable insertion hole 34 formed in the lower side wall 32b of the cover main body 31, and the cable C inserted into the cover main body 31 is inserted. May be pulled into the wiring box 10 using the cable insertion hole 14 formed in the lower side wall 12b of the wiring box 10.

In the embodiment, the positioning pieces 36 and 37 may be deleted.
In the embodiment, the positioning protrusion 40 may be deleted.
In the embodiment, for example, the outer surface 121 d of the left side wall 12 d of the wiring box 10 is provided with a locking projection that locks to the peripheral edge of the through hole 38, and the locking protrusion is locked to the peripheral edge of the through hole 38. By doing so, the wiring box 10 may be positioned in the accommodation space 33. In this case, the peripheral edge portion of the through hole 38 functions as a positioning portion.

  In the embodiment, the depth of the accommodation space 33 is such that the opening 13 of the wiring box 10 is the opening of the cover body 31 when the wiring box 10 is accommodated in the accommodation space 33 and the wiring box 10 is positioned in the accommodation space 33. Although it was set so that it may be located on the same plane as 31a, it is not restricted to this. The depth of the accommodation space 33 may be set so that the opening 13 of the wiring box 10 does not protrude from the opening 31 a of the cover body 31 in a state where the wiring box 10 is accommodated in the accommodation space 33.

  In the embodiment, a fire-resistant putty may be filled between the cable C and the cable insertion hole 34. In this case, the space K <b> 1 is a space necessary for filling a fire-resistant putty between the cable C and the cable insertion hole 34.

  In the embodiment, a pipe that accommodates the cable C may be attached to the cable penetration hole 34. When the pipe is attached to the cable penetration hole 34, a connector provided in the pipe is connected to the cable penetration hole 34 using a nut. In this case, the space K <b> 1 is a space necessary for connecting the pipe to the cable insertion hole 34.

In the embodiment, the space K1 and the space K2 may be deleted.
In the embodiment, each through hole 38 may not be provided at a position corresponding to each through hole 16 in a state where the wiring box 10 is housed in the housing space 33.

  In the embodiment, an insertion hole penetrating in the thickness direction is formed in the flange 41, and a fixing screw is inserted into the insertion hole with the flange 41 in contact with the front surface of the column H. The fireproof wiring box 1 may be fixed to the pillar H by forcibly screwing into the pillar H.

  In embodiment, the flange 41 was formed in the perimeter part of the opening 31a, but it is not restricted to this, You may delete the site | part which does not contact | abut on the front surface of the pillar H in the flange 41. That is, only the part where the flange contacts the front surface of the column H may be provided.

In the embodiment, the thickness of the flange 41 is not particularly limited.
In the embodiment, the flange 41 may be deleted.

  B: Fixing screw as a fixing member, C: Cable, H: Column as construction material, K1, K2 ... Space, W ... Wall, W1 ... Wall material, 1 ... Fire-resistant wiring box, 10 ... Wiring box, 12a ... Upper side wall as side wall, 12b ... Lower side wall as side wall, 14 ... Cable insertion hole, 16 ... Insertion hole, 30 ... Fireproof cover, 31 ... Cover body, 31a ... Opening, 32 ... Bottom wall forming peripheral wall, 32a ... Upper wall forming a peripheral wall, 32b lower wall forming a peripheral wall, 32c right side wall forming a peripheral wall, 32d left side wall forming a peripheral wall and functioning as an abutting portion, 33 ... accommodating space, 34 ... cable through Insertion holes, 36, 37 ... positioning pieces as positioning parts, 38 ... penetration holes, 40 ... positioning protrusions as positioning parts, 41 ... flanges, 52 ... second right side walls as space forming parts, 55, 65, 75 Cable wiring space.

Claims (13)

  Formed in the shape of a bottomed box having an opening on the front surface by a peripheral wall composed of a bottom wall and a side wall erected on the periphery of the bottom wall, and installed on the back of the wall and fixed to a construction material for constructing the wall A fireproof cover, characterized in that a housing space for housing a wiring box made of synthetic resin includes a metal cover body formed by the peripheral wall. The cover body includes a flange extending outward from the opening edge of the peripheral wall,
The flange is in contact with the front surface of the building material in an installed state on the back wall of the cover body,
2. The fireproof cover according to claim 1, wherein the flange has a thickness that does not affect when a wall material is installed on the front surface of the construction material.   The fireproof cover according to claim 2, wherein the flange is formed on at least opposing side walls.   The fireproof cover according to claim 3, wherein the flange is formed on the entire periphery of the opening edge of the peripheral wall. The cover body has an abutting portion that abuts against a side surface of the building material in an installed state behind the wall;
The contact portion is formed with a through hole for a fixing member that fixes the wiring box to the construction material, and the wiring box is formed with an insertion hole through which the fixing member is inserted.
The said insertion hole is provided in the position corresponding to the said insertion hole in the state in which the said wiring box was accommodated in the said accommodation space, The Claim 1 characterized by the above-mentioned. Fireproof cover as described. The side wall of the cover body is formed with a cable insertion hole through which the cable is inserted,
The space is formed in the accommodation space between the side wall in which the cable penetration hole is formed and the side wall of the wiring box facing the side wall. The fireproof cover according to any one of the above.   On the side wall of the cover body, the cable drawn into the housing space from the cable insertion hole is directed toward the cable insertion hole formed on the side wall of the wiring box while being along the outside of the side wall of the wiring box. The fireproof cover according to claim 6, further comprising a space forming portion for forming a cable wiring space for wiring.   8. The positioning device according to claim 1, further comprising: a positioning portion that positions the wiring box in the housing space when the wiring box is housed in the housing space. A fireproof cover according to any one of the above. A fireproof wiring box installed behind the wall,
A synthetic resin wiring box fixed to the construction material that builds the wall,
A housing wall that is formed in a bottomed box shape having an opening on the front surface by a peripheral wall composed of a bottom wall and a side wall erected on the periphery of the bottom wall and is installed on the back of the wall to accommodate the wiring box. A fireproof wiring box comprising a fireproof cover having a metal cover body formed by a peripheral wall. An installation structure of a fireproof wiring box installed on the back side of a wall in which wall materials are installed on the front of a plurality of construction materials,
The fireproof wiring box is a synthetic resin wiring box fixed to the construction material;
A housing wall that is formed in a bottomed box shape having an opening on the front surface by a peripheral wall composed of a bottom wall and a side wall erected on the periphery of the bottom wall and is installed on the back of the wall to accommodate the wiring box. Comprising a metal cover main body formed by a peripheral wall, the cover main body comprising a fireproof cover formed at least on opposite side walls, with a flange extending outward from the opening edge of the peripheral wall;
An installation structure of a fireproof wiring box, wherein the flange is sandwiched between a front surface of two construction materials sandwiching the cover body and the wall material.   A cable wiring space for routing a cable toward a cable insertion hole formed in the side wall of the cover body while being along the outside of the side wall of the cover body, the construction material, and the construction material facing the construction material The fireproof wiring box installation structure according to claim 10, wherein the fireproof wiring box installation structure is formed between a side wall of the cover body. It is an installation structure of a fire-resistant wiring box installed on the back side of the wall where the wall material is installed on the front of the construction material,
The fireproof wiring box is a synthetic resin wiring box fixed to the construction material;
A housing wall that is formed in a bottomed box shape having an opening on the front surface by a peripheral wall composed of a bottom wall and a side wall erected on the periphery of the bottom wall and is installed on the back of the wall to accommodate the wiring box. It consists of a fireproof cover with a metal cover body formed by a peripheral wall,
An installation structure for a fireproof wiring box, wherein a cable penetration hole is formed in a lower side wall of the side walls, and a cable is drawn into the housing space from the cable penetration hole.   The installation structure of the fireproof wiring box according to claim 12, wherein a cable wiring space for wiring the cable toward the cable insertion hole is formed along the side wall of the cover body. .

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